Wow, that sucks - really sorry to hear that.
I've had a place broken into before (they got a motorcycle, among other things that all add up..
), and it sucks, to put it mildly.
3 suggestions, maybe one of them might work for you.
1. If you really want to keep paper notes, get a cheap all in one printer, or even just an updated scanner. Scan to email or to your system, and keep one or more folders..but set them up on dropbox, so you're not stuck to a single PC/Mac/device having access, and not tied to e.g. a single USB key that can and do go bad.
2. Considering creating an Excel workbook, possibly embedding pictures of targets into favorite loads. I use an Excel to track my components, max OAL and SNs for all firearms....then again, store or copy it to Dropbox or other cloud based storage.
3. If Excel isn't your thing (not sure it's anyones, really, but works OK for some things), something like Evernote or OneNote run across most devices, easily allow drag n drop of pictures into each page...and are already cloud based.